{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MOC3043VM","brand":"onsemi","brandSlug":"onsemi","productSlug":"MOC3043VM","canonicalUrl":"https://icboms.com/onsemi/MOC3043VM","factsUrl":"https://icboms.com/api/mcp/products/MOC3043VM","rawCanonicalId":null},"summary":{"shortDescription":"onsemi MOC3043VM optoisolator, Triac output, 1 channel, 4170 Vrms isolation, 400 V off-state, zero-crossing circuit, Through Hole 6-DIP, Bulk.","salesMarkdown":"## Triac output with zero-crossing — what it means for the load The MOC3043VM drives a Triac output with a built-in zero-crossing circuit, so the output triggers on only when the AC mains voltage crosses zero — this suppresses the inrush current spike you get when switching resistive or lightly inductive loads at the peak of the sine wave. The 400 V off-state rating means it blocks line voltage up to that peak, suitable for 240 VAC nominal circuits with margin. ## Isolation barrier and transient immunity Rated for 4170 Vrms isolation — this is a reinforced-level test voltage, certified under IEC/EN/DIN and UL. The minimum static dV/dt of 1 kV/µs tells you the output Triac won't falsely trigger on fast voltage transients from the mains side, a common failure in motor-drive or relay-coil circuits without this spec. ## Trigger and hold characteristics for the control side Typical hold current is 400 µA — once triggered, the Triac stays latched until the load current drops below that level, which at the AC zero crossing is the natural commutation point.","metaTitle":"onsemi MOC3043VM Optoisolator, Triac Output, 6-DIP","metaDescription":"onsemi MOC3043VM optoisolator with Triac output, 4170 Vrms isolation, zero-crossing circuit, 400 V off-state, UL approved. Active production, sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Optoisolators"],"specifications":{"Package":"Bulk","Output Type":"Triac","Mounting Type":"Through Hole","Package / Case":"6-DIP (0.300\\\", 7.62mm)","Approval Agency":"IEC/EN/DIN, UL","lifecycle_stage":"eol_hot","Number of Channels":"1","Static dV/dt (Min)":"1kV/µs","Current - Hold (Ih)":"400µA (Typ)","Voltage - Isolation":"4170Vrms","Voltage - Off State":"400 V","Operating Temperature":"-40°C ~ 85°C","Zero Crossing Circuit":"Yes","Supplier Device Package":"6-DIP","Voltage - Forward (Vf) (Typ)":"1.25V","Current - DC Forward (If) (Max)":"60 mA","Current - LED Trigger (Ift) (Max)":"5mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.94","stockQuantity":20,"priceTiers":[{"qty":1,"price":"$1.94000","currency":"USD"},{"qty":10,"price":"$1.22900","currency":"USD"},{"qty":100,"price":"$0.90940","currency":"USD"},{"qty":500,"price":"$0.83566","currency":"USD"},{"qty":1000,"price":"$0.68819","currency":"USD"},{"qty":2000,"price":"$0.65379","currency":"USD"},{"qty":5000,"price":"$0.63904","currency":"USD"},{"qty":10000,"price":"$0.62429","currency":"USD"}]},"links":{"datasheetUrl":null,"sourceUrl":null},"ai":{"faq":[{"question":"Does the MOC3043VM include a zero-crossing circuit?","answer":"Yes — the zero-crossing circuit is built in, so the output Triac switches on near the AC voltage zero crossing. This reduces EMI and inrush current when driving loads like solenoids, heaters, or lamp ballasts."},{"question":"What isolation voltage does the MOC3043VM provide?","answer":"4170 Vrms isolation, tested per UL and IEC/EN/DIN standards. That is a reinforced-level rating suitable for line-voltage isolation in industrial controls and appliance interfaces."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/MOC3043VM","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/MOC3043VM when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:45:10.375Z","lastPublished":"2026-07-22T19:45:10.375Z","indexable":true}}